Publications related to Spacecraft attitude control

Calibration of Fixed-Wing UAV Aerodynamic Coefficients with Photogrammetry for VDM-based Navigation

Autonomous navigation is a crucial aspect for fixed-wing unmanned aerial vehicle operation when encountering disturbance or denial of GNSS signal reception. Vehicle dynamic model-based navigation improves the performance of methods based exclusively on int ...

2021

Simulation Tool : Resources Management in High Performance Avionic for ADR Missions

Jean-Paul Richard Kneib, Michaël Yannick Juillard

This paper describes the second iteration in the development of a simulation tool that provides trade-offs of avionic architectures for future Active Debris Removal (ADR) space missions. Challenges of ADR missions lay in their ability to first detect and t ...

IEEE2021

Dynamic force coefficients identification on air-lubricated herringbone grooved journal bearing

Jürg Alexander Schiffmann, Eliott Philippe Guenat

The Narrow Groove Theory (NGT) is commonly used to simulate and design grooved gas bearing. However, measurements of dynamic force coefficients of Herringbone Grooved Journal Bearings (HGJBs) is missing, hence the validation historic NGT has never been per ...

2020

Optimal spanwise-periodic control for recirculation length in a backward-facing step flow

François Gallaire, Edouard Boujo, Eunok Yim

Three-dimensional control is considered in the flow past a backward-facing step (BFS). The BFS flow at Reynolds number Re = 500 (defined with the step height and the maximum inlet velocity) is two-dimensional and linearly stable but increasingly receptive ...

AMER PHYSICAL SOC2020

On the calibration aspects of MEMS-IMUs used in micro UAVs for sensor orientation

Jan Skaloud, Philipp Clausen

We introduce a three step procedure to improve attitude determination by MEMS-IMU sensors on board a small UAV. IMU pre-calibration is performed first and only once in the lab; second in a simplified version and for every switch-on in the field. Together, ...

IEEE/ION2020

Rotor Position Estimation with Hall-Effect Sensors in Bearingless Drives

Yves Perriard, Juan Patricio Tomás Peralta Fierro

The estimation of rotor position is fundamental for the commissioning of magnetically-levitated drives. The sensors required for this measurement must be close to the rotor, often requiring constructive measures that may limit the application potential of ...

IEEE2020

Real-world speed estimation using single trunk IMU: methodological challenges for impaired gait patterns

Kamiar Aminian, Anisoara Ionescu, Abolfazl Soltani

Walking speed (WS) is recognized as an important dimension of functional health and a candidate endpoint for clinical trials. To be adopted as a powerful outcome measure in clinical assessment, WS should be estimated pervasively and accurately in the real- ...

IEEE2020

Magnetic Bearing Reaction Wheel Micro-vibration Signature Prediction

Yves Perriard, Douglas Martins Araujo, Leopoldo Rossini, Guzmán Borque Gallego

This article presents an analytical micro-vibration model for magnetic bearing reaction wheels (MBRWs) based on a rotordynamics model combined with the active control loop. This model is validated employing a fullyactive Lorentz-type MBRW demonstrator and ...

2019

On-line micro-vibration measurement method for Lorentz-type magnetic-bearing space actuators

Yves Perriard, Douglas Martins Araujo, Leopoldo Rossini, Guzmán Borque Gallego

A novel, cost-effective, real-time and on-line method for measuring the generated micro-vibrations and iden- tifying the forces in a magnetic bearing space actuator is proposed. For its validation, an actively-controlled electrodynamic (Lorentz-type) magne ...

2019

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Spacecraft attitude control

Calibration of Fixed-Wing UAV Aerodynamic Coefficients with Photogrammetry for VDM-based Navigation

Simulation Tool : Resources Management in High Performance Avionic for ADR Missions

Dynamic force coefficients identification on air-lubricated herringbone grooved journal bearing

Optimal spanwise-periodic control for recirculation length in a backward-facing step flow

On the calibration aspects of MEMS-IMUs used in micro UAVs for sensor orientation

Rotor Position Estimation with Hall-Effect Sensors in Bearingless Drives

Real-world speed estimation using single trunk IMU: methodological challenges for impaired gait patterns

Magnetic Bearing Reaction Wheel Micro-vibration Signature Prediction

On-line micro-vibration measurement method for Lorentz-type magnetic-bearing space actuators

Accurate 3-axis measurement of inhomogeneous magnetic fields

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On-line micro-vibration measurement method for Lorentz-type magnetic-bearing space actuators

Real-world speed estimation using single trunk IMU: methodological challenges for impaired gait patterns

Simulation Tool : Resources Management in High Performance Avionic for ADR Missions

Rotor Position Estimation with Hall-Effect Sensors in Bearingless Drives

On the calibration aspects of MEMS-IMUs used in micro UAVs for sensor orientation

Accurate 3-axis measurement of inhomogeneous magnetic fields

Dynamic force coefficients identification on air-lubricated herringbone grooved journal bearing

Magnetic Bearing Reaction Wheel Micro-vibration Signature Prediction

Calibration of Fixed-Wing UAV Aerodynamic Coefficients with Photogrammetry for VDM-based Navigation

Optimal spanwise-periodic control for recirculation length in a backward-facing step flow